The following list contains all the item types for which you can create multiple items.
Motors
Motors + Heaters (only based on a reference item)
Heaters (as a stand-alone heater only; space heaters are not supported)
Heat traces
Capacitors
Harmonic filters
Resistors
Lighting fixtures
Socket outlets
Welding outlets
Transfer switches
Other electrical equipment
Offsite power supplies
Generators
Battery banks
Battery chargers
Other converting equipment
Transformers (only 2-winding transformers; 3-winding transformers can only be created based on a reference 3-winding transformer)
Uninterruptible power supplies (UPSs)
Variable frequency drives
Current limiting reactors
Power distribution boards
Contactors
Overload relays
Disconnect switches
Circuit breakers
Fuses
Starters
Other disconnect equipment
Metering equipment (current transformers and potential transformers only)
Instruments
Cabinets
Control stations
Local panels
Junction boxes
Power cables
Control cables
Instrumentation cables
Single-core cable assemblies
Busways
Cable drums
Free-Standing buses
Note that you cannot create multiple items in custom folders.